Generation of high-purity microwave signals from a dual-frequency OP-VECSEL

Fabiola Camargo; Gaëlle Lucas-Leclin; Paul Dumont; Patrick Georges; Jean-Marie Danet; David Holleville; Stéphane Guerandel; Gregoire Pillet; Ghaya Baili; Loic Morvan; Daniel Dolfi; Iryna Gozhyk; Grégoire Beaudoin; Isabelle Sagnes

doi:10.1117/12.2041669

7 March 2014 Generation of high-purity microwave signals from a dual-frequency OP-VECSEL

Fabiola Camargo, Gaëlle Lucas-Leclin, Paul Dumont, Patrick Georges, Jean-Marie Danet, David Holleville, Stéphane Guerandel, Gregoire Pillet, Ghaya Baili, Loic Morvan, Daniel Dolfi, Iryna Gozhyk, Grégoire Beaudoin, Isabelle Sagnes

Author Affiliations +

Proceedings Volume 8966, Vertical External Cavity Surface Emitting Lasers (VECSELs) IV; 89660L (2014) https://doi.org/10.1117/12.2041669
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Coherent population trapping (CPT) is an interesting technique for the development of compact atomic frequency references. We describe an innovating laser source for the production of the two cross-polarized coherent laser fields which are necessary in CPT-based atomic clocks. It relies on the dual-frequency and dual-polarization operation of an optically-pumped vertical external-cavity semiconductor laser. This particular laser emission is induced by intracavity birefringent components which produce a controllable phase anisotropy within the laser cavity and force emission on two cross-polarized longitudinal modes. The laser emission is tuned at the Cs D₂ line (λ = 852.14 nm), and the frequency difference Δν between the two laser modes is tunable in the microwave range. The laser line wavelength is stabilized onto an atomic hyperfine transition, and concurrently the frequency difference is locked to an ultra-low noise RF oscillator at 9.2 GHz. The high spectral purity of the optically-carried microwave signal resulting from the beatnote of the two cross-polarized laser lines is assessed through its narrow spectral linewidth (<30 Hz) as well as its low phase noise (≤ -100 dBrad²/Hz). The performance of this laser source is already adequate for the interrogation of atoms in a CPT atomic clock, and should result in an estimated relative stability of 3.10^-13τ^-1/2 – one order of magnitude better than commercial atomic clocks.

Citation Download Citation

Fabiola Camargo, Gaëlle Lucas-Leclin, Paul Dumont, Patrick Georges, Jean-Marie Danet, David Holleville, Stéphane Guerandel, Gregoire Pillet, Ghaya Baili, Loic Morvan, Daniel Dolfi, Iryna Gozhyk, Grégoire Beaudoin, and Isabelle Sagnes "Generation of high-purity microwave signals from a dual-frequency OP-VECSEL", Proc. SPIE 8966, Vertical External Cavity Surface Emitting Lasers (VECSELs) IV, 89660L (7 March 2014); https://doi.org/10.1117/12.2041669

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Atomic clocks

Clocks

Cesium

Laser stabilization

Polarization

Chemical species

Crystals

Show All Keywords

Keywords/Phrases

Search In:

Publication Years